| 摘要 |
Freewheel with reduced wear and noisiness, in which sprags are housed oscillating in respective containment slots obtained in the hub. Said containment slots have at their end a concave wall against which the sprag is to thrust and bear, at the other end a concave wall for holding the sprag and, between one and the other ends, a convex wall having a throat in which is housed a spring. The sprags are able to engage with stepped notches formed circumferentially in the shaft, having, mutually orthogonal, a thrust wall and a bearing surface.
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